I wonder if the difference in opinions has to do not with right or wrong as a matter of physics but rather with the customary use of terminology. As I have understood it, the phrase “velocity factor” is ordinarily used in connection with transmission lines; AND it is the case that the velocity of a wave in any medium other than free space can differ – that is to say, it’s slower. Whether the technical term “velocity factor” covers it all I can’t say. Maybe in ordinary usage the generic term is “velocity of propagation” which in wires can vary from 0.7 to 0.99 C
Ted, KN1CBR
------------------------------
Message: 12
Date: Thu, 29 Dec 2016 18:44:57 -0500
From: Don Wilhelm <
[hidden email]>
To: Walter Underwood <
[hidden email]>, Elecraft Reflector
Reflector <
[hidden email]>
Subject: Re: [Elecraft] Small QRP antenna
Message-ID: <
[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed
Walt,
I differ, antenna wires do have a velocity factor to consider. I built
a 6 meter Moxon beam for my grandson out of insulated wire, and the
resonant frequency was considerably low. Stripping the insulation from
the wire brought its resonance point up to what was expected.
The only reason was because the velocity factor for the insulated wire
was less than that of non-insulated wire.
73,
Don W3FPR
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.htmlMessage delivered to
[hidden email]
Locked
